A gamer is suing Sony for $5m (£3m) because he believes the graphics in a PlayStation 4 shoot-em-up are not good enough.

California resident Douglas Ladore accuses the company of "deceptive marketing" over Killzone: Shadow Fall because it does not run in the advertised high-definition 1080p resolution when in multiplayer mode.

Developer Guerilla says on its website that a technical shortcut is used to achieve a high definition effect, which is known as "temporal reprojection".

The lawsuit claims that Sony's claim that the game is full HD is therefore misleading.

Court documents state: "Unfortunately, Sony’s marketing and on-box representations turned out to be nothing more than fiction."

The legal action has been filed by law firm Edelson PC in the Northern District California court.

The firm is behind a separate class action lawsuit against Sega over its 2013 game Aliens Colonial Marines, which some consumers said was poor quality.